xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc+of: Add of node/property notification chain for adds and removes

Browse Source 
This patch moves the notification chain for updates to the device tree
from the powerpc/pseries code to the base OF code. This makes this
functionality available to all architectures.

Additionally the notification chain is updated to allow notifications
for property add/remove/update. To make this work a pointer to a new
struct (of_prop_reconfig) is passed to the routines in the notification chain.
The of_prop_reconfig property contains a pointer to the node containing the
property and a pointer to the property itself. In the case of property
updates, the property pointer refers to the new property.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Nathan Fontenot
2012-10-02 16:57:57 +00:00
committed by Benjamin Herrenschmidt
parent f594972083
commit 1cf3d8b3d2
12 changed files with 163 additions and 154 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/crypto/nx/nx-842.c
View File

@@ -28,7 +28,6 @@
#include <linux/slab.h>
#include <asm/page.h>
#include <asm/pSeries_reconfig.h>
#include <asm/vio.h>
#include "nx_csbcpb.h" /* struct nx_csbcpb */
@@ -1014,26 +1013,23 @@ error_out:
* NOTIFY_BAD encoded with error number on failure, use
* notifier_to_errno() to decode this value
*/
static int nx842_OF_notifier(struct notifier_block *np,
unsigned long action,
void *update)
static int nx842_OF_notifier(struct notifier_block *np, unsigned long action,
void *update)
{
struct pSeries_reconfig_prop_update *upd;
struct of_prop_reconfig *upd = update;
struct nx842_devdata *local_devdata;
struct device_node *node = NULL;
upd = (struct pSeries_reconfig_prop_update *)update;
rcu_read_lock();
local_devdata = rcu_dereference(devdata);
if (local_devdata)
node = local_devdata->dev->of_node;
if (local_devdata &&
action == PSERIES_UPDATE_PROPERTY &&
!strcmp(upd->node->name, node->name)) {
action == OF_RECONFIG_UPDATE_PROPERTY &&
!strcmp(upd->dn->name, node->name)) {
rcu_read_unlock();
nx842_OF_upd(upd->property);
nx842_OF_upd(upd->prop);
} else
rcu_read_unlock();
@@ -1182,7 +1178,7 @@ static int __init nx842_probe(struct vio_dev *viodev,
synchronize_rcu();
kfree(old_devdata);
pSeries_reconfig_notifier_register(&nx842_of_nb);
of_reconfig_notifier_register(&nx842_of_nb);
ret = nx842_OF_upd(NULL);
if (ret && ret != -ENODEV) {
@@ -1228,7 +1224,7 @@ static int __exit nx842_remove(struct vio_dev *viodev)
spin_lock_irqsave(&devdata_mutex, flags);
old_devdata = rcu_dereference_check(devdata,
lockdep_is_held(&devdata_mutex));
pSeries_reconfig_notifier_unregister(&nx842_of_nb);
of_reconfig_notifier_unregister(&nx842_of_nb);
rcu_assign_pointer(devdata, NULL);
spin_unlock_irqrestore(&devdata_mutex, flags);
synchronize_rcu();

1
drivers/crypto/nx/nx.c
View File

@@ -33,7 +33,6 @@
#include <linux/scatterlist.h>
#include <linux/device.h>
#include <linux/of.h>
#include <asm/pSeries_reconfig.h>
#include <asm/hvcall.h>
#include <asm/vio.h>